She told me of being pregnant and later had a stillbirth at the 7months.

The background.
I met her when we were teens and have always loved her. She refused me sex and along the line, her neighbor gave me (who is her relation). She learnt about this and we had our first break up.
We both got admission into different universities and couldn't see again.
We later met again and settled with a condition that there would be no sex. This didn't go down well with me and I called it off. This repeated and there was even a time I walked her out of my house because of this issue and didn't give her tfare. My house is like 1hr drive from where she lives.
The issue:
I love this girl to the extent that anytime I thought of getting married, she will come to mind.
Now I have a good job and she's done with school. I proposed to her and she accepted it.
Is about 3 months now, she came on my birthday 3 months ago. That was all. She doesn't come always because she stays with her elder brother and can't leave house just like that.

Note, we haven't had sex till now.

About 2 weeks ago, I told her about how I got a girl pregnant and we had to abort it and that since then I haven't been myself. That it pains me to this day. We talked about it and she was sorry over it.

Yesterday, we had a very deep discussion and she revealed to me that she had a relationship at school. They were together for 4yrs. I then asked her if she had ever missed her period. She said yes. But not to this school boyfriend but another man. She wanted to keep the pregnancy but her parents refused because the guy is not a good person. The guy wanted the pregnancy but her family didn't want the guy to marry her. She finally had a stillbirth at the 7th month.

I was stunned. I know she's not a virgin, she told me but I was confused. Sex had always been our problem and I never expected that she had experienced something like this. Now she asked me that she hope she won't regret telling me this. I told her no that she won't regret but I'm stunned.

Please should I still go on with this marriage?